registration or authorization) to be maintained in good standing, and in a manner that does not modify or impair any applicable warranties. 

 **(d)**        Any service, repair and maintenance shall take precedence over scheduling of
the Aircraft for Lease Operations, unless such can be safely deferred in accordance with applicable laws and regulations. 

 **(e)**Lessee shall, at Lessee’s cost and expense, replace or have repaired appliances, parts, instruments, appurtenances, accessories, furnishings, and other equipment or components
of the Aircraft that may have become worn out, lost, stolen, destroyed, damaged or otherwise rendered unfit for use for any reason whatsoever. All such replacements or repairs installed on or incorporated into the Aircraft shall upon such
installation or incorporation become the property of Lessor. 

 **(f)**Lessee shall not make any change in the configuration, appearance or coloring of the Aircraft from that in effect at the beginning of the Lease Term, other than changes mandated by
the FAA or consented to in writing by Lessor. Lessee shall, at Lessee’s cost and expense, make only such alterations or modifications to the Aircraft that: (i) are necessary or advisable to comply with Lessee’s obligations pursuant to
this Agreement, or (ii) as are required to comply with any applicable law or any governmental rule or regulation.